The stealth startup, backed by Variant and PayPal Ventures, wants to be the neutral coordination layer for global money movement without issuing tokens or holding funds.
A new fintech startup called Atum just stepped out of stealth mode with a $13.5 million seed round and a pitch that sounds almost counterintuitive: build a payments network that doesn’t actually move the payments.
The San Francisco-based company unveiled its Open Payments Network on September 22, designed to act as a coordination layer connecting payment initiators, like apps, enterprises, and AI agents, with independent settlement providers who actually handle the money. Atum itself never issues currency, never operates a blockchain, and never takes custody of anyone’s funds.
Who’s betting on this
The seed round was led by Variant, the crypto-native venture fund known for backing protocol-level infrastructure. PayPal Ventures and Abstract Ventures also participated, giving Atum a roster of backers that spans both traditional payments and crypto.
At the helm is Pete Cooling, who previously led Visa’s crypto product efforts and was involved with the Linux OpenWallet Foundation. His background straddles exactly the two worlds Atum is trying to bridge: legacy payment rails and the programmable money infrastructure that crypto protocols have been building for years.
How it actually works
The mechanics of Atum’s network center on a simple but powerful idea: unlink the person starting a payment from the entity settling it.
A payment initiator, whether that’s a fintech app, a card issuer, or even an autonomous AI agent, submits a payment request specifying what asset the sender wants to use and what the receiver wants to get. Settlement providers then compete by offering real-time quotes to fulfill that request. The winning provider handles the actual movement of funds across whatever rails are needed, while smart contracts lock funds until delivery is verified.
Atum also supports what it calls agentic payments. The platform accommodates transactions initiated by AI agents through protocols like x402 and MPP, positioning itself for a future where software autonomously makes and receives payments without human intervention.
